package example1;

public class Business {
	UsbDiskWriter writer;

	public Business() {
		writer = new UsbDiskWriter();
	}

	public void save() {
		System.out.println("业务数据保存");
		writer.save();
	}

	public static void main(String[] args) {
		Business business = new Business();
		business.save();
	}
}
